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OnePlus OnePlus Ace 6 Ultra vs Xiaomi POCO X8 Pro Max

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

OnePlusOnePlus Ace 6 UltraXiaomiPOCO X8 Pro Max
Overview
ReleasedApril 2026March 2026
Display
Screen size6.78″6.83″
Resolution2772 × 12722772 × 1280
Sharpness450 pixels per inch447 pixels per inch
PanelOLEDOLED
Refresh rate165 Hz120 Hz
Peak brightness–3,500 nits
Display type6.78-inch flat flexible OLED, 10-bit colour and 100% DCI-P3; discrete 60/90/120/144/165 Hz switching. 144/165 Hz work only in selected scenesAMOLED, 12-bit colour, DCI-P3 and 94.27% screen-to-body ratio
Pixel density450 ppi–
Brightness detailMaker typical values: 800 nits maximum normal brightness and 1,800 nits triggered full-screen brightness800 nits typical, 2,000 nits high-brightness mode and 3,500 nits peak covering 25% of the screen
Always-on displaySupported–
Screen protectionOPPO Crystal Shield front glass (Chinese maker name translated)Corning Gorilla Glass 7i
Display features3840 Hz PWM; PWM at ≤70 nits and DC-like dimming above 70 nits. Eye-comfort, sleep, sunlight, low-white-point, motion-sickness and gaming-colour modes; rain and glove touchHDR10+, Dolby Vision, 3,840 Hz PWM dimming, 480 Hz touch sampling and 2,560 Hz instant touch sampling in Game Turbo, Wet Touch 2.0 and TÜV low-blue-light, flicker-free and circadian-friendly certifications
Performance
ChipMediaTek Dimensity 9500MediaTek Dimensity 9500s
Memory12 GB – 16 GB12 GB
Storage256 GB, 512 GB, 1 TB256 GB, 512 GB
CPU3 nm, eight cores: four prime and four performance; up to 4.21 GHzSecond-generation TSMC 3 nm process; one Cortex-X925 up to 3.73 GHz, three Cortex-X4 up to 3.3 GHz and four Cortex-A720 up to 2.4 GHz
GPU–Arm Immortalis-G925 MC11, up to 1.6 GHz
AI engine–MediaTek NPU 890
Memory12 or 16 GB LPDDR5X Ultra–
Storage type256 GB, 512 GB or 1 TB UFS 4.1LPDDR5X RAM at 9,600 Mbps and UFS 4.1 enhanced storage firmware; 12 GB/256 GB or 12 GB/512 GB
CoolingVapour chamber and graphite system; optional magnetic cooler sold separately. Maximum gaming performance remains dependent on mode and environment5,800 mm² IceLoop cooling and 11,000 mm² graphite layer; WildBoost workload optimisation
Cameras
Main camera50 MP50 MP
Ultra wide camera8 MP8 MP
Telephoto cameraNoneNone
Optical zoomNoneNone
Front camera16 MP20 MP
Main camera50 MP, optical format 1/1.55 inch, f/1.8, 23 mm equivalent, six-element lens; autofocus and two-axis OISLight Fusion 600, 50 MP, f/1.5, 1/1.95-inch sensor, OIS, six-element lens and 4-in-1 binning to 1.6 µm pixels
Ultra wide camera8 MP, f/2.2, 16 mm equivalent, five-element lens and 112° field of view8 MP, f/2.2
Front camera16 MP, f/2.4, 23 mm equivalent and four-element lens; autofocus unpublished20 MP
ZoomNo optical telephoto; up to 20× digital photo zoom or 10× digital video zoom2× in-sensor crop described by the maker as optical-level; no separate telephoto camera
Video recording4K or 1080p at 30/60 fps, 720p 30; stabilised 4K/1080p 30/60. Slow motion 1080p/720p 240; time-lapse 4K/1080p 30. Pro video and multi-view supported4K at 30/60 fps, Full HD at 30/60 fps and HD at 30 fps; slow motion HD or Full HD at 120/240/960 fps; sunset portrait video at 4K or Full HD at 30 fps
Front video1080p or 720p 30 fps, stabilisation at both; 1080p 30 time-lapse and multi-viewFull HD at 30/60 fps, HD at 30 fps and HD slow motion at 120 fps
Camera featuresSingle-colour-temperature LED flash; portrait, night, panorama, long exposure, slow motion, scanning, professional modes, AI ID photo and tilt-shift; rear JPG/HEIF/RAW, front JPG/HEIFUltraSnap burst capture up to 120 photos, Dynamic Shots, motion capture and tracking focus, documents, portrait, Pro, 50 MP mode, voice shutter, HDR, panorama, long exposure, timed burst, video teleprompter, Dual Video, time-lapse and ShootSteady; regional AI image-editing tools
Battery and charging
Battery8,600 mAh8,500 mAh
Wired chargingUp to 120 WUp to 100 W
Wireless chargingNoneNone
Battery life detailDual-cell: 2 × 4,300 mAh / 32.43 Wh typical, equivalent to 8,600 mAh energy; 2 × 4,190 mAh / 31.60 Wh rated, equivalent to 8,380 mAh. Maker five-year ≥80% capacity claim assumes a cycle every 1.35 days8,500 mAh typical UK silicon-carbon battery with 16% silicon content and 847 Wh/L stated energy density; capacity varies by region; maker laboratory claims over 74 hours calls, 16 hours video calls or 15 hours gaming
Wired chargingUp to 120 W SUPERVOOC or 120 W UFCS; compatible 100 W and lower SUPERVOOC, 44 W third-party UFCS, 55 W PPS and 13.5 W PD. Bypass power supported. Maker 49 minutes from 1% to 100% assumes 25°C, airplane mode, screen off and supplied adapter100 W HyperCharge, 100 W PPS and PD 3.0/2.0; maker laboratory claim of 1–50% in 24 minutes at 25°C with Top Speed enabled and display off; official 100 W or higher adaptor recommended
Wireless charging–Not supported, as reported by Tech Advisor and TechRadar
Charges other devices–Up to 27 W wired reverse charging for compatible devices tested by POCO
Design
TypeStandardStandard
Weight217 g218 g
Thickness8.45 mm8.2 mm
Height × width162.45 × 77.47 mm162.9 × 77.9 mm
Water and dust resistanceIP68IP68
MaterialsAluminium-alloy mid-frame; Crystal Shield front glass on both finishes. Black rear is Crystal Shield glass; titanium-coloured rear is AG glass, not titanium metalMetal frame and fibreglass back; SGS five-star certification for drop, bending and crushing resistance
Colours王牌觉醒 (Ace Awakening, black), 金属风暴 (Metal Storm, titanium-coloured); English descriptions translate Chinese names. Approximately 217 g black or 219 g titanium-coloured; optional controller and cooler excludedBlack, White and Blue; White has decorative stripes; camera RGB lighting offers eight colours for supported notifications, calls, charging, music and games
ButtonsConfigurable shortcut key, power and volume keys–
Water resistance detailMaker IP66/IP68/IP69 under GB/T 4208-2017 and IP69K under ISO 20653:2023; IP66/IP69/IP69K tested upright with USB port downwards. Protection may decline with wearUK IP68; maker test in static freshwater at 2 m for 30 minutes with temperature difference no greater than 5°C; resistance can decline with wear
BiometricsIn-display ultrasonic fingerprint readerUltrasonic in-display fingerprint reader and AI Face Unlock
SensorsProximity, ambient light, colour temperature, compass, accelerometer, gyroscope and infrared remote transmitter; X-axis linear motor. Gyroscope up to 500 Hz in game modeProximity, ambient light, accelerometer, electronic compass, gyroscope, IR blaster and flicker sensor; X-axis linear vibration motor
SpeakersStereo pair of metal-frame 1115W speaker units; 1115W is the maker component designation, not an acoustic wattageTwo symmetrical 1115F speakers, Dolby Atmos, Hi-Res Audio and Hi-Res Wireless Audio; volume boost applies to selected media, ringtones and notifications
MicrophonesTwo microphones; OReality AudioTwo-microphone array
Software
Operating systemAndroidAndroid
Software at launchColorOS 16.0 based on Android; maker does not publish Android major version in exact table. Chinese sale 28 April 2026Xiaomi HyperOS 3; Android 16 confirmed by Tech Advisor and TechRadar
Software updates–Four major Android upgrades and six years of security updates reported at launch by Tech Advisor and TechRadar
AI featuresChinese ColorOS AI tools and gaming assistant; supported games/scenes vary. Gaming cloud network free for two years from entitlement claim, then paid OPPO plan. iPhone, computer and Apple Watch sharing require compatible software and appsRegional AI Writing, Speech Recognition, Interpreter, Creativity Assistant, Search, Dynamic Wallpapers, Google Gemini and Circle to Search; supported games can use 120 fps interpolation, 1.5K super resolution and Game HDR
Safety features–Regional Xiaomi Offline Communication supports calls over 500 m in open environments with a SIM and signed-in Xiaomi account; actual range depends on surroundings
In the boxPhone, charger, USB cable, SIM ejector, protective case and quick-start guide. Gunfire gaming controller and magnetic cooler sold separatelyPhone, USB-C cable, SIM tool, protective case, safety information, quick-start guide and warranty card; standard UK box excludes adaptor
Connectivity
Mobile networkChinese hardware: GSM 850/900/1800 MHz; WCDMA B1/5/6/8/19; LTE-FDD B1/3/4/5/8/18/19/26/28A/66, LTE-TDD B34/38/39/40/41/42/43/48; 5G n1/3/5/8/18/26/28A/34/38/39/40/41/48/66/77/78. Carrier conditions apply5G SA/NSA, LTE, WCDMA and GSM; regional network support varies
SIMDual nano-SIM, both support 5G; two China Telecom cards require VoLTE on non-data card and carrier supportDual nano-SIM or nano-SIM plus eSIM; eSIM depends on region and carrier
Wi-FiWi-Fi 7 (be), 6 (ax), 5 (ac), a/b/g/n; 2×2 MIMO, concurrent 2.4/5 GHz, 160 MHz at 5 GHz. G2 Pro gaming-network chipWi-Fi 7/6/5/4, 2.4/5 GHz, multi-link operation, 2×2 MIMO, 8×8 sounding for MU-MIMO, Wi-Fi Direct and Miracast; standards depend on region, network and applicable updates
BluetoothBluetooth 6.0, BLE and BLE Audio; maker notes adaptation if regulatory policy changesBluetooth 6.0, Dual-Bluetooth; SBC, AAC, LDAC, LHDC 5.0, LC3, ASHA and Auracast
NFC13.56 MHz cards, HCE and eSE; NFC SIM on slot 1 only. Chinese transit, payment, access-card, car-key and eID services depend on region and serviceSupported; regional functions vary
USBUSB-C, USB 2.0USB-C
PositioningBeiDou B1I/B1C/B2a/B2b, GPS L1/L5, GLONASS G1, Galileo E1/E5a/E5b, QZSS L1/L5, NavIC L5; assisted, WLAN and cellular positioningGPS L1/L5, BeiDou B1I/B1C/B2a/B2b, Galileo E1/E5a/E5b, GLONASS G1, QZSS L1/L5 and NavIC L1/L5; assisted positioning

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